After much testing I find that although glob() is much cleaner than opendir(), it is also much slower.
I started by making a dir called "cache" in which I placed a single 65k html file filled with whitespace (just so I could have a large filesize without worrying about char output).
Based on the code below:
<?php
//Waste a little time to offset PHP's startup.
for($i=0; $i<20; $i++) {
print ' ';
}
$start_time = time()+microtime(true);
ob_start();
for($x=0; $x < 20; $x++) {
$dir = 'cache/';
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
//Include the file
include($file);
//$value = rand(0, 10000) * 2345678;
}
closedir($dh);
}
}
}
ob_end_clean();
print ((time()+microtime(true)) - $start_time). ' (opendir time)<br />';
$start_time = time()+microtime(true);
ob_start();
for($x=0; $x < 20; $x++) {
//Include the function files
foreach (glob("cache/*.html") as $file) {
//Include the file
include($file);
//$value = rand(0, 10000) * 2345678;
}
}
ob_end_clean();
print ((time()+microtime(true)) - $start_time). ' (glob time)<br />';
?>The result was:
0.0069890022277832 (opendir time)
0.027945041656494 (glob time)
So I can honestly recommend opendir if you plan on including the files in the dir.
After further testing I found that a simple preg_match() search is also faster than exploding something.
0.0014879703521729 explode
0.0012550354003906 preg
0.054396152496338 glob
<?php
for($i=0; $i<20; $i++) {
print ' ';
}
$start_time = time()+microtime(true);
ob_start();
for($x=0; $x < 10; $x++) {
//glob() is much slower so we use opendir...
foreach(array('cache/', 'cache/') as $dir) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
if(end(explode('.', $file)) == 'php') {
//Include the file
require_once($dir. $file);
//Update the array of files included
$site_config["included_files"][$file] = filesize($file);
} else {
print $dir. ' '. $file. '<br />';
}
}
closedir($dh);
} else {
die('<h2>Error!</h2<p>Couldn\'t load '. $dir. '</p>');
}
}
}
ob_end_clean();
print ((time()+microtime(true)) - $start_time). ' explode <br />';
$start_time = time()+microtime(true);
ob_start();
for($x=0; $x < 20; $x++) {
//glob() is much slower so we use opendir...
foreach(array('cache/', 'cache/') as $dir) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
if(preg_match("/.php/", $file)) {
//Include the file
require_once($dir. $file);
//Update the array of files included
$site_config["included_files"][$file] = filesize($file);
} else {
print $dir. ' '. $file. '<br />';
}
}
closedir($dh);
} else {
die('<h2>Error!</h2<p>Couldn\'t load '. $dir. '</p>');
}
}
}
ob_end_clean();
print ((time()+microtime(true)) - $start_time). ' preg <br />';
$start_time = time()+microtime(true);
ob_start();
for($x=0; $x < 20; $x++) {
//Include the function files
foreach (glob("cache/*.html") as $file) {
//Include the file
include($file);
//$value = rand(0, 10000) * 2345678;
}
}
ob_end_clean();
print ((time()+microtime(true)) - $start_time). ' glob <br />';
?>
